I don't buy this reasoning.
I think that the chases/unique figures are the thing that keeps this line going. If they continue to release weak chases (ala DX1's Boba Fett) fewer people will purchase Master Cases which means reduced sales which could be bad for the longevity of the line.
I'm not holding out much hope for the chases for DX2 at this stage though...
By comparison, the weak chases (DX1) are right up there with the weak selection of basic characters for DX1-DX4. The majority of the basic 6 for all the DX series have become repaints, tweaked repacks, or vinyl capes versions. If DX2 chases are battle-damaged Luke and blue star Snowtrooper, I'm skipping a box of 12 again. If DX2 chases are AT-ST Driver and Rebel Trooper, I'm spending some cash.